Average annual temperature is 20.4 °C
Absolute maximum temperature: 40.8 °C
Absolute minimum temperature: -1.2 °C
Number of sunny days: 190 days
Number of rainy days: 175 days
Look at detailed online map of Grayson
* Weather data for Grayson United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 24.8 | 28.4 | 28.2 | 29.8 | 32.7 | 38.3 | 38.4 | 40.8 | 38.1 | 32.6 | 28.8 | 25.3 |
| Average daytime temperature (°C) | 17.4 | 19.4 | 22.5 | 23.7 | 29.0 | 33.9 | 35.6 | 37.8 | 32.9 | 27.3 | 19.5 | 17.1 |
| Average temperature (°C) | 12.4 | 13.5 | 16.3 | 18.1 | 23.2 | 27.3 | 29.4 | 31.6 | 26.7 | 21.0 | 14.0 | 11.3 |
| Average night temperature (°C) | 8.6 | 9.2 | 11.8 | 13.6 | 18.4 | 22.2 | 24.6 | 26.1 | 21.7 | 15.9 | 10.0 | 6.7 |
| Absolute minimum temperature (°C) | -1.0 | -0.5 | -1.2 | 8.8 | 12.0 | 19.6 | 21.5 | 20.4 | 17.5 | 6.7 | 1.7 | -0.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.3 | 11.0 | 12.0 | 13.0 | 13.8 | 14.2 | 14.0 | 13.3 | 12.4 | 11.4 | 10.5 | 10.1 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 6.8 | 7.3 | 8.4 | 8.0 | 10.6 | 11.8 | 11.3 | 11.8 | 10.4 | 8.9 | 6.3 | 7.7 |
| Precipitation (mm) | 160 | 84 | 91 | 216 | 104 | 92 | 58 | 27 | 49 | 26 | 77 | 81 |
| Sunny days | 11 | 12 | 14 | 13 | 12 | 7 | 14 | 23 | 17 | 25 | 19 | 23 |
| Rainy days | 20 | 16 | 17 | 17 | 19 | 23 | 17 | 8 | 13 | 6 | 11 | 8 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Grayson during the most sunny months:
The largest precipitation sum in Grayson is at